St. Louis River-U.S. Steel Superfund Site

U.S. Steel site location

The U.S. Steel Plant Duluth Works Site, a former steel mill and coking operation, is on both the federal National Priorities List (NPL) and the State of Minnesota Permanent List of Priorities (PLP). The site is approximately 600 acres (500 land and 100 river sediment). It is located 4 miles south-west of the Duluth central business district and adjacent to the neighborhood of Morgan Park.

The U.S. Steel Site has 18 Operable Units (OU) and two areas identified within the 1989 Record of Decision (ROD) for remedial action. Current work on this site is focused on the identification and cleanup of the sediments in the St. Louis River and follow up actions from the 2013 Five-Year Review. Most land-based contamination has been addressed as specified in the ROD.

Public comment

USEPA is seeking comments on the proposed cleanup plan for the site's contaminated sediment. The comment period closed Sept. 25, 2016. For more information, contact Scott Cieniawski, Great Lakes National Program Office, (G-17J) - EPA Region 5, 77 W. Jackson Blvd., Chicago, IL 60604-3590 or email

Documents related to the proposed plan are available at the West Duluth Library, 5830 Grand Ave., Duluth, MN 55807.

A related public information meeting was held Aug. 25, 2016. See the Public Meetings page for more details.

More information and staff contacts

For information and assistance about the U.S. Steel Superfund Site, contact any of the following MPCA staff.

All MPCA staff can be contacted via the toll-free (voice and TTY) number, 800-657-3864.